Patents by Inventor Hong-San Kim
Hong-San Kim has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10292220Abstract: Disclosed is an improved light-emitting device for an AC power operation. A conventional light emitting device employs an AC light-emitting diode having arrays of light emitting cells connected in reverse parallel. The arrays in the prior art alternately repeat on/off in response to a phase change of an AC power source, resulting in short light emission time during a ½ cycle and the occurrence of a flicker effect. An AC light-emitting device according to the present invention employs a variety of means by which light emission time is prolonged during a ½ cycle in response to a phase change of an AC power source and a flicker effect can be reduced. For example, the means may be switching blocks respectively connected to nodes between the light emitting cells, switching blocks connected to a plurality of arrays, or a delay phosphor.Type: GrantFiled: August 5, 2016Date of Patent: May 14, 2019Assignee: SEOUL VIOSYS CO., LTD.Inventors: Chung Hoon Lee, James S. Speck, Hong San Kim, Jae Jo Kim, Sung Han Kim, Jae Ho Lee
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Publication number: 20160345398Abstract: Disclosed is an improved light-emitting device for an AC power operation. A conventional light emitting device employs an AC light-emitting diode having arrays of light emitting cells connected in reverse parallel. The arrays in the prior art alternately repeat on/off in response to a phase change of an AC power source, resulting in short light emission time during a ½ cycle and the occurrence of a flicker effect. An AC light-emitting device according to the present invention employs a variety of means by which light emission time is prolonged during a ½ cycle in response to a phase change of an AC power source and a flicker effect can be reduced. For example, the means may be switching blocks respectively connected to nodes between the light emitting cells, switching blocks connected to a plurality of arrays, or a delay phosphor.Type: ApplicationFiled: August 5, 2016Publication date: November 24, 2016Inventors: Chung Hoon Lee, James S. Speck, Hong San Kim, Jae Jo Kim, Sung Han Kim, Jae Ho Lee
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Patent number: 9445462Abstract: Disclosed is an improved light-emitting device for an AC power operation. A conventional light emitting device employs an AC light-emitting diode having arrays of light emitting cells connected in reverse parallel. The arrays in the prior art alternately repeat on/off in response to a phase change of an AC power source, resulting in short light emission time during a ½ cycle and the occurrence of a flicker effect. An AC light-emitting device according to the present invention employs a variety of means by which light emission time is prolonged daring a ½ cycle in response to a phase change of an AC power source and a flicker effect can be reduced. For example, the means may be switching blocks respectively connected to nodes between the light emitting cells, switching blocks connected to a plurality of arrays, or a delay phosphor.Type: GrantFiled: March 20, 2015Date of Patent: September 13, 2016Assignee: SEOUL VIOSYS CO., LTD.Inventors: Chung Hoon Lee, James S. Speck, Hong San Kim, Jae Jo Kim, Sung Han Kim, Jae Ho Lee
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Publication number: 20160240740Abstract: A light emitting diode (LED) package includes a package body having a recessed portion, a first lead electrode and a second lead electrode spaced apart from each other, and a light emitting device arranged in the recessed portion and electrically connected to the first lead electrode and the second lead electrode. The LED package is configured to be driven by an alternating current (AC) and by a voltage higher than that for driving one light emitting diode.Type: ApplicationFiled: April 25, 2016Publication date: August 18, 2016Inventors: Chung Hoon LEE, Keon Young LEE, Hong San KIM, Dae Won KIM, Hyuck Jung CHOI
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Publication number: 20150195872Abstract: Disclosed is an improved light-emitting device for an AC power operation. A conventional light emitting device employs an AC light-emitting diode having arrays of light emitting cells connected in reverse parallel. The arrays in the prior art alternately repeat on/off in response to a phase change of an AC power source, resulting in short light emission time during a ½ cycle and the occurrence of a flicker effect. An AC light-emitting device according to the present invention employs a variety of means by which light emission time is prolonged daring a ½ cycle in response to a phase change of an AC power source and a flicker effect can be reduced. For example, the means may be switching blocks respectively connected to nodes between the light emitting cells, switching blocks connected to a plurality of arrays, or a delay phosphor.Type: ApplicationFiled: March 20, 2015Publication date: July 9, 2015Inventors: Chung Hoon Lee, James S. Speck, Hong San Kim, Jae Jo Kim, Sung Han Kim, Jae Ho Lee
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Publication number: 20150129904Abstract: A light emitting diode (LED) package includes a package body having a recessed portion, a first lead electrode and a second lead electrode spaced apart from each other, and a light emitting device arranged in the recessed portion and electrically connected to the first lead electrode and the second lead electrode. The LED package is configured to be driven by an alternating current (AC) and by a voltage higher than that for driving one light emitting diode.Type: ApplicationFiled: January 19, 2015Publication date: May 14, 2015Inventors: Chung Hoon LEE, Keon Young LEE, Hong San KIM, Dae Won KIM, Hyuck Jung CHOI
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Patent number: 9030110Abstract: Disclosed is an improved light-emitting device for an AC power operation. A conventional light emitting device employs an AC light-emitting diode having arrays of light emitting cells connected in reverse parallel. The arrays in the prior art alternately repeat on/off in response to a phase change of an AC power source, resulting in short light emission time during a ½ cycle and the occurrence of a flicker effect. An AC light-emitting device according to the present invention employs a variety of means by which light emission time is prolonged during a ½ cycle in response to a phase change of an AC power source and a flicker effect can be reduced. For example, the means may be switching blocks respectively connected to nodes between the light emitting cells, switching blocks connected to a plurality of arrays, or a delay phosphor.Type: GrantFiled: July 16, 2010Date of Patent: May 12, 2015Assignee: Seoul Viosys Co., Ltd.Inventors: Chung Hoon Lee, James S. Speck, Hong San Kim, Jae Jo Kim, Sung Han Kim, Jae Ho Lee
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Patent number: 8937326Abstract: Disclosed is a light emitting diode (LED) package having an array of light emitting cells coupled in series. The LED package comprises a package body and an LED chip mounted on the package body. The LED chip has an array of light emitting cells coupled in series. Since the LED chip having the array of light emitting cells coupled in series is mounted on the LED package, it can be driven directly using an AC power source.Type: GrantFiled: February 24, 2011Date of Patent: January 20, 2015Assignee: Seoul Semiconductor Co., Ltd.Inventors: Chung Hoon Lee, Keon Young Lee, Hong San Kim, Dae Won Kim, Hyuck Jung Choi
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Patent number: 8866417Abstract: Exemplary embodiments of the present invention disclose a light-emitting device including a first power source connection terminal and a second power source connection terminal, the first and second power source connection terminals configured to be connected to an external power source, and a plurality of light emitting cell arrays, each of the plurality of light emitting cell arrays being connected in parallel to one another between the first and the second power source connection terminals, each of the plurality of light emitting cell arrays comprising serially connected light emitting cells. Each of the light emitting cells includes a first conductivity-type semiconductor layer, a second conductivity-type semiconductor layer, an active layer disposed between the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer, and an electrode pad disposed on the second conductivity-type semiconductor layer.Type: GrantFiled: August 28, 2013Date of Patent: October 21, 2014Assignee: Seoul Viosys Co., Ltd.Inventors: Chung Hoon Lee, James S. Speck, Hong San Kim, Jae Jo Kim, Sung Han Kim, Jae Ho Lee
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Patent number: 8860331Abstract: Disclosed is an improved light-emitting device for an AC power operation. An AC light-emitting device according to the present invention employs a variety of means by which light emission time is prolonged during a ½ cycle in response to a phase change of an AC power source and a flicker effect can be reduced. For example, the means may be switching blocks respectively connected to nodes between the light emitting cells, switching blocks connected to a plurality of arrays, or a delay phosphor. Further, there is provided an AC light-emitting device, wherein a plurality of arrays having the different numbers of light emitting cells are employed to increase light emission time and to reduce a flicker effect.Type: GrantFiled: February 8, 2013Date of Patent: October 14, 2014Assignee: Seoul Viosys Co., Ltd.Inventors: Chung Hoon Lee, James S. Speck, Hong San Kim, Jae Jo Kim, Sung Han Kim, Jae Ho Lee
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Patent number: 8716946Abstract: Disclosed is an improved light-emitting device for an AC power operation. A conventional light emitting device employs an AC light-emitting diode having arrays of light emitting cells connected in reverse parallel. The arrays in the prior art alternately repeat on/off in response to a phase change of an AC power source, resulting in short light emission time during a ½ cycle and the occurrence of a flicker effect. An AC light-emitting device according to the present invention employs a variety of means by which light emission time is prolonged during a ½ cycle in response to a phase change of an AC power source and a flicker effect can be reduced. For example, the means may be switching blocks respectively connected to nodes between the light emitting cells, switching blocks connected to a plurality of arrays, or a delay phosphor.Type: GrantFiled: October 20, 2010Date of Patent: May 6, 2014Assignee: Seoul Opto Device Co., Ltd.Inventors: Chung Hoon Lee, James S. Speck, Hong San Kim, Jae Jo Kim, Sung Han Kim, Jae Ho Lee
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Publication number: 20140028204Abstract: Exemplary embodiments of the present invention disclose a light-emitting device including a first power source connection terminal and a second power source connection terminal, the first and second power source connection terminals configured to be connected to an external power source, and a plurality of light emitting cell arrays, each of the plurality of light emitting cell arrays being connected in parallel to one another between the first and the second power source connection terminals, each of the plurality of light emitting cell arrays comprising serially connected light emitting cells. Each of the light emitting cells includes a first conductivity-type semiconductor layer, a second conductivity-type semiconductor layer, an active layer disposed between the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer, and an electrode pad disposed on the second conductivity-type semiconductor layer.Type: ApplicationFiled: August 28, 2013Publication date: January 30, 2014Applicant: Seoul Opto Device Co., Ltd.Inventors: Chung Hoon LEE, James S. Speck, Hong San Kim, Jae Jo Kim, Sung Han Kim, Jae Ho Lee
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Patent number: 8610138Abstract: Disclosed is a light emitting diode (LED) package having an array of light emitting cells coupled in series. The LED package comprises a package body and an LED chip mounted on the package body. The LED chip has an array of light emitting cells coupled in series. Since the LED chip having the array of light emitting cells coupled in series is mounted on the LED package, it can be driven directly using an AC power source.Type: GrantFiled: November 15, 2011Date of Patent: December 17, 2013Assignee: Seoul Semiconductor Co., Ltd.Inventors: Chung Hoon Lee, Keon Young Lee, Hong San Kim, Dae Won Kim, Hyuok Jung Choi
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Patent number: 8445933Abstract: Disclosed is a light emitting diode (LED) package having an array of light emitting cells coupled in series. The LED package comprises a package body and an LED chip mounted on the package body. The LED chip has an array of light emitting cells coupled in series. Since the LED chip having the array of light emitting cells coupled in series is mounted on the LED package, it can be driven directly using an AC power source.Type: GrantFiled: May 18, 2010Date of Patent: May 21, 2013Assignee: Seoul Semiconductor Co., Ltd.Inventors: Chung Hoon Lee, Keon Young Lee, Hong San Kim, Dae Won Kim, Hyuck Jung Choi
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Patent number: 8395332Abstract: Disclosed is an improved light-emitting device for an AC power operation. An AC light-emitting device according to the present invention employs a variety of means by which light emission time is prolonged during a ½ cycle in response to a phase change of an AC power source and a flicker effect can be reduced. For example, the means may be switching blocks respectively connected to nodes between the light emitting cells, switching blocks connected to a plurality of arrays, or a delay phosphor. Further, there is provided an AC light-emitting device, wherein a plurality of arrays having the different numbers of light emitting cells are employed to increase light emission time and to reduce a flicker effect.Type: GrantFiled: May 1, 2012Date of Patent: March 12, 2013Assignee: Seoul Opto Device Co., Ltd.Inventors: Chung Hoon Lee, James S. Speck, Hong San Kim, Jae Jo Kim, Sung Han Kim, Jae Ho Lee
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Patent number: 8368190Abstract: Disclosed is a light emitting diode (LED) package having an array of light emitting cells coupled in series. The LED package comprises a package body and an LED chip mounted on the package body. The LED chip has an array of light emitting cells coupled in series. Since the LED chip having the array of light emitting cells coupled in series is mounted on the LED package, it can be driven directly using an AC power source.Type: GrantFiled: March 29, 2011Date of Patent: February 5, 2013Assignee: Seoul Semiconductor Co., Ltd.Inventors: Chung Hoon Lee, Keon Young Lee, Hong San Kim, Dae Won Kim, Hyuck Jung Choi
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Publication number: 20120217885Abstract: Disclosed is an improved light-emitting device for an AC power operation. An AC light-emitting device according to the present invention employs a variety of means by which light emission time is prolonged during a ½ cycle in response to a phase change of an AC power source and a flicker effect can be reduced. For example, the means may be switching blocks respectively connected to nodes between the light emitting cells, switching blocks connected to a plurality of arrays, or a delay phosphor. Further, there is provided an AC light-emitting device, wherein a plurality of arrays having the different numbers of light emitting cells are employed to increase light emission time and to reduce a flicker effect.Type: ApplicationFiled: May 1, 2012Publication date: August 30, 2012Applicant: SEOUL OPTO DEVICE CO., LTD.Inventors: Chung Hoon LEE, James S. SPECK, Hong San KIM, Jae Jo KIM, Sung Han KIM, Jae Ho LEE
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Patent number: 8188687Abstract: Disclosed is an improved light-emitting device for an AC power operation. A conventional light emitting device employs an AC light-emitting diode having arrays of light emitting cells connected in reverse parallel. The arrays in the prior art alternately repeat on/off in response to a phase change of an AC power source, resulting in short light emission time during a ½ cycle and the occurrence of a flicker effect. An AC light-emitting device according to the present invention employs a variety of means by which light emission time is prolonged during a ½ cycle in response to a phase change of an AC power source and a flicker effect can be reduced. For example, the means may be switching blocks respectively connected to nodes between the light emitting cells, switching blocks connected to a plurality of arrays, or a delay phosphor.Type: GrantFiled: May 9, 2006Date of Patent: May 29, 2012Assignee: Seoul Opto Device Co., Ltd.Inventors: Chung Hoon Lee, James S. Speck, Hong San Kim, Jae Jo Kim, Sung Han Kim, Jae Ho Lee
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Publication number: 20120097996Abstract: Disclosed is a light emitting diode (LED) package having an array of light emitting cells coupled in series. The LED package comprises a package body and an LED chip mounted on the package body. The LED chip has an array of light emitting cells coupled in series. Since the LED chip having the array of light emitting cells coupled in series is mounted on the LED package, it can be driven directly using an AC power source.Type: ApplicationFiled: December 30, 2011Publication date: April 26, 2012Applicant: SEOUL SEMICONDUCTOR CO., LTD.Inventors: Chung Hoon LEE, Keon Young LEE, Hong San KIM, Dae Won KIM, Hyuck Jung CHOI
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Patent number: 8159000Abstract: Disclosed is a light emitting diode (LED) package having an array of light emitting cells coupled in series. The LED package comprises a package body and an LED chip mounted on the package body. The LED chip has an array of light emitting cells coupled in series. Since the LED chip having the array of light emitting cells coupled in series is mounted on the LED package, it can be driven directly using an AC power source.Type: GrantFiled: June 14, 2011Date of Patent: April 17, 2012Assignee: Seoul Semiconductor Co., Ltd.Inventors: Chung Hoon Lee, Keon Young Lee, Hong San Kim, Dae Won Kim, Hyuck Jung Choi